Vane pump and profile determination method inside cam ring constituting the same

摘要

The present invention relates to a vane pump capable of increasing the theoretical discharge rate by increasing the volume of a vane pump chamber while reducing wear of the vane pump, and a profile determination method inside a cam ring constituting the vane pump. For this purpose, the cam ring profile determination method according to the present invention includes a cam ring accommodated in a pump housing, a rotor accommodated in the cam ring so as to be rotatable about a rotation axis, and a fluid coupled to the rotor. A method of determining a profile inside a cam ring of a vane pump including a plurality of vanes to be discharged, wherein the cam ring is variable between a maximum radius (Rmax) and a minimum radius (Rmin) in a circumferential direction around the rotation axis. Determining a maximum radius (Rmax) point; determining a cycloid curve passing through the maximum radius (Rmax) point; connecting the cycloid curve with a tangent curvature and tilting the tangent Determining a line; and said change It is connected by a tangent curvature on the end of Ntorain, determining an arc passing through the minimum radius (Rmin) points; including.